Fig. 6From: Novel properties of photofermentative biohydrogen production by purple bacteria Rhodobacter sphaeroides: effects of protonophores and inhibitors of responsible enzymesATPase activity of Rh. sphaeroides MDC6522 membrane vesicles, which was calculated by colorimetric determination of liberation of inorganic phosphate (Pin) per time and protein upon ATP adding (see “Methods”)Back to article page